Processing method, device and system of network address, WLAN (wireless local area network) and UE (user equipment)

The invention provides a processing method, device and system of network addresses, a WLAN (wireless local area network) and UE (user equipment). The method comprises the steps that a receiving WLAN access network acquires a flow route strategy of the UE, and the receiving WLAN access network distributes at least one network address for the UE according to the flow route strategy of the UE. Through the adoption of the method, device and system, the WLAN and the UE, the problem that the UE is incapable of realizing forward compatibility in the authentication process is solved, and the benefic effect of improving the UE compatibility is realized.